Simplify with built-in functions where possible. e.g.

change [x for x in y if x] to filter(None, y)
change [f(x) for x in y] to map(f, x)
change [x for x in y] to list(y)

These changes reduce source code size and complexity and produce some minor performance gains

svn: r14104

src/GrampsLogger/_RotateHandler.py

@@ -28,8 +28,8 @@ class RotateHandler(logging.Handler):
         Return the buffer with the records in the correct order.
         """
 
-        return [record for record in self._buffer[self._index:] + self._buffer[:self._index]
-                if record is not None]
+        return filter(None,
+                self._buffer[self._index:] + self._buffer[:self._index])
 
     def get_formatted_log(self, remove_tail_duplicate=None):
         """